Barrel lock



Dec. 7, 1948. V 0, RQSENGREN I 2,455,608

BARREL LOCK Filed Aug. 51, 1945 Urvar E-Rusan ran IL/V-MvMJKV-MQ poration of my device.

Patented Dec. 7, 1948 t i UNITED-Q s'rAr t BARREL LQCK t Orvar Rosengren, Hamden, Conn. l l f ApplicationAugu st 31, 1945, Serial No. 613,867

The invention relates to barrel locksf ior the 2 Claims. (c1; 42; 75)

barrels of machine guns, and its object is, to pre I sent a lock which may be quickly 'operatedih the field, to release a hot barrel and enable its replacement quickly by a cool barrel, in accordance with recent practice wherein such procedure has been foundpreferable tdithe use of water cooling, especially for infantry' operating in rough terrain. It is an object of the invention to avoid complicated and delicate construction of the locking parts so as to miniinize the liability, of impairment of the device by accumulation of dirt incident to rough handling ofweaponsinthe field. It is alsoanaim toisavoid adding appreciably, to the weight of a weapon by the incor- Additional objects, advantages and features of invention reside in the construction arrangement and combination of parts involved in the embodiment of the invention as will be described or will be understood in the following description and accompanying drawings, wherein:

Figure 1 is a fragmentary top view of a weapon in which my invention has been incorporated;

Figure 2 is a cross section on the line 2-2 of Figure 1;

Figure 3 is a longitudinal section on theline 3-3 of Figure 2;

Figure 4 is a side view of a modification;

Figure 5 is a section on the line 55 of Figure 4; p

Figure 6 is a side view of the strap lock;

Figure '7 is a bottom view of the strap lock;

Figure 8 is a perspective detail of the latch piece I8.

Figure 9 is a detail perspective of the latch 1 Referring more particularly to the drawings there is illustrated a portion oi 'a receiver l0, including a sleeve portion I l suitably bored to receive a barrel l2 slidably therein, the barrel having a circumscribing wedge shaped channel l3 the sides of which are divergent radially so that the groove is wider at the top, than at the bottom. Any suitable means may be provided for stopping the barrel at proper operative position when inserted in the sleeve II, which means is not illustrated since it comprises no novel part of the present invention. Formed in the receiver sleeve I I in position to align with the channel 13 when the barrel is emplaced, there is a slot l4 extending transversally across the top of the receiver and stopping oneach side at a level slightly above the axis of the barrel. side of the receiver, pivot ears l5 are formed on At one the receiver adjacent respective sides of the slot I l, located below the slot, and pivoted between these cars there is a strap lock leconsisting of a lever suitably shaped to extend upwardly be side the receiverand across the latter in the slot I l ofthe right hand side, where a handle I! is formed integrally thereon, which projects laterally from the receiver a short distance. The medial portion of the strap member is curved to fit the barrel and shaped at its under side to fit the channel i3 so as to wedge slightly therein when the handle is lowered to engagement with the receiver. Its upper part fits snugly between the sides of the slot [4. The under side of the handle I] is recessed, and has a latch 18 pivoted therein at the inner end part of the recess adjacentthe barrel, and extending outwardly to near the end of the handle, 'the upper side of the latch being bored to hold a compression spring i9 against the handle so that the spring presses the latch downwardly. Adjacent the side of the receiver, the latch is extended downwardly below the handle and has an inwardly extended bill 20 arranged to engage snugly in a keeper recess 2! formed in the side of the receiver, so as to hold the strap in place snugly upon an engaged barrel. The bill is bevelled on the lower inner side and the latch has an inner heel portion 22 to limit downward movement of the latch by the spring so that this device may be moved to, and caught in engaged position by simple downward pressure on the handle 1, the bevelled portion of the latch bill engaging the junction of the top face and side of the receiver and thereby serving to cam the latch outward in such closing movement of the strap. The relation of the upper side of the recess 2| and of the bill 2|] is such that the latter bears upwardly against the upper side of the recess at latched position of the parts.

In the use of the device, the strap is disengaged by grasping and pressing together the handle l1 and latch l8 by the thumb and forefinger, and raising and swinging the strap to the left hand side of the receiver, after which a barrel may be withdrawn longitudinally, and a new one inserted similarly with its channel [3 under the slot M. The inserted barrel may then be secured by flipping the strap over and downward toward the right side of the arm and pressing it to latched position. In Figures 4 and 5, the construction of the receiver is the same as before described, excepting that the keeper recess 2| is not required, and

the strap member I6 is also the same as that before described with the exception that instead of the short handle I], an elongated handle 25 is provided, which, in the latched position of the device extends downwardly in slightly spaced relation to the side of the receiver, and is recessed and provided with a latch device the same as that before described, the parts of which have the same reference characters applied thereto as used on the first described latch, with the addition of aiprimemark't This latch 18' may catch under a low keeper part *26 on the underside of the receiver, or other pieces of the gun, the

length for this purpose.

considerably, so that a latch springazofr greater strength may be employed, and at the same time its manual release facilitated.

I have disclosed my invention with particularity in the best form in which it has been constructed,v and perfected by, me, but it .will be understood that this is purely exemplary and that-various changes in structure and arrangement,- substitutions of materials and equivalents, mechanical'or otherwise, :may be made Without departing from the-spirit of the invention particularlyset forth. in the appended claims, where.-

1: In a gun,v,albarrelvhaving aniexterior cir: cumferential groove extending completely. around saidwbarrelnearl the-breech end thereof, are-- ceiverhaving archamberi within which the part of said, barrel" having the. said. circumferential groove fits; saidreceiver having :a slot transversely across a the top. thereof l and I so. positioned H as, to registerwith saidgroove when the: barrel 'is fittedl with saidchamber, astrapradaptedtofit within said slot and groove whenithey register with .each

other, said strap at one end being pivoted to said receiver adjacent one end of said slot, a latching means at the other end of said strap, and means on said receiver near the other end of said slot with which said latch coacts to secure said strap in locked position in said groove and slot.

2. In a gun, a barrel having an annulus around and adjacent the breech end thereof, a receiver having'xa: chamber. within which the-part of said barrel having said annulus fits, said receiver having a recess transversely across the top thereof and so positioned as to register with said annulus when. the barrel is fitted in said chamber, an arcuate arm adapted to fit within said annulus andwrecessawhen they register with each other, said arcuate arm at one end being pivoted to said receiver adjacent one end of said recess, a latchingmean-s at the other end of said arcuate arm, and means on said receiver near the other end of said recesswith which said latch coacts to secure said arcuate arm in locked'position in said an-,

nulus and recess.

ORVAR E. ROSENGREN;

REFERENES QETED The: following references areof record in the filemf this-patent:

UNITED STATES PATENTS Number Name Date.

1,639,277. Soncini ,Aug...16, 1927 2,345,833. Schirokauer. V Apr; 4,1944.

' FOREIGN PATENTS Number Country Date, 

